(19)

(11)

EP 2 516 861 A2

(12)

(88) Date of publication A3: 23.08.2012 (43) Date of publication: 31.10.2012 Bulletin 2012/44 (21) Application number: 10819720.3 (22) Date of filing: 21.12.2010

(51) International Patent Classification (IPC):  F04C 2/14(2006.01) (86) International application number: PCT/IB2010/003323 (87) International publication number: WO 2011/077230 (30.06.2011 Gazette 2011/26)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 21.12.2009 US 643172 (71) Applicant: Eaton Corporation Cleveland Ohio 44114-2584 (US)	(72) Inventor: OUWENGA, Daniel, R. Battle Creek MI 49014 (US) (74) Representative: Emde, Eric  Wagner & Geyer Gewürzmühlstrasse 5 80538 München 80538 München (DE)